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BLoC (Business Logic Component) state management in Flutter

  Let’s go step by step — you’ll understand BLoC (Business Logic Component) state management in Flutter clearly and practically with a real example . 🧠 What is BLoC? BLoC helps separate your UI (presentation) from your business logic . It follows the principle: UI sends events → BLoC processes them → emits new states → UI rebuilds. So instead of writing logic inside your setState() , you handle logic inside the BLoC , and the UI just listens. ⚙️ Core Concepts Concept Role Example Event Represents what happened (user actions) IncrementEvent , FetchUserEvent State Represents the UI condition CounterInitial , CounterUpdated(5) Bloc Handles logic, maps Events → States CounterBloc BlocProvider Makes a Bloc available to widgets BlocProvider(create: (_) => CounterBloc()) BlocBuilder Rebuilds UI when state changes Updates counter display automatically 🧩 Example: Counter App using BLoC Let’s build a simple counter app using flutter_bloc package. 🪜 Step 1: Add Dependency In pu...
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Set up Node.js

  Set up Node.js . On Apple Silicon, the setup is almost the same as Intel, but some tools need ARM64 builds. I'll give you the main methods step by step: ✅ Method 1: Install Node.js with Homebrew (simple & recommended) Install Homebrew (if not already installed): /bin/bash -c " $(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh) " Install Node.js (includes npm): brew install node Verify installation : node -v npm -v You should see versions (e.g., v22.x.x for Node and 10.x.x for npm). ✅ Method 2: Install Node.js using Node Version Manager (nvm) (best for multiple versions) 👉 Recommended if you work on different projects needing different Node versions. Install nvm : curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.7/install.sh | bash Load nvm (add this to your ~/.zshrc or ~/.bashrc ): export NVM_DIR= " $HOME /.nvm" [ -s " $NVM_DIR /nvm.sh" ] && \. " $NVM_DIR...
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Set up MySQL on your MacBook Pro with the M1 (Apple Silicon)

Set up MySQL on your MacBook Pro with the M1 (Apple Silicon). I'll give you the step-by-step installation methods . You can choose whichever suits you best: ✅ Method 1: Install MySQL using Homebrew (Recommended) This is the easiest and cleanest way. Install Homebrew (if not already installed): Open Terminal and run:      Terminal Command: /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" Install MySQL : brew install mysql Start MySQL service : brew services start mysql Check MySQL status : brew services list Login to MySQL : mysql -u root (Optional) Set root password : ALTER USER 'root' @ 'localhost' IDENTIFIED WITH mysql_native_password BY 'your_password' ; FLUSH PRIVILEGES; ✅ Method 2: Install MySQL using the official DMG installer If you prefer GUI setup: Go to MySQL Community Downloads . Select macOS (ARM64) for M1. Download the DMG Archive and install it...
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The background and foreground state of the app itself in Flutter

About the  background and foreground state of the app itself in Flutter . This is different from widget state — this is about the lifecycle of the entire app . 🔹 Foreground vs Background in Flutter Foreground state → your app is visible on screen (user is actively using it). Background state → user pressed Home , switched to another app, or screen is off (your app is running but not visible). Terminated → user killed the app or system closed it. 🔹 Detecting App Lifecycle in Flutter Flutter provides WidgetsBindingObserver or the AppLifecycleState enum. Example:  import 'package:flutter/material.dart'; class AppLifecycleExample extends StatefulWidget {   @override   _AppLifecycleExampleState createState() => _AppLifecycleExampleState(); } class _AppLifecycleExampleState extends State<AppLifecycleExample>     with WidgetsBindingObserver {   AppLifecycleState? _lastState;   @override   void initState() {     ...
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About of Microservices

  Microservices architecture is  a software development approach where an application is structured as a collection of small, independent, and loosely coupled services .  These services are designed to handle specific business functionalities and can be developed, deployed, and scaled independently.  This approach contrasts with monolithic architectures, where the entire application is built as a single, large codebase.   Key Characteristics of Microservices: Independent Deployability: Each microservice can be deployed independently without affecting other services.   Loosely Coupled: Services interact with each other through well-defined APIs, minimizing dependencies between them.   Bounded Context: Each service focuses on a specific business capability within a defined context.   Decentralized Governance: Teams can choose different technologies and tools for different services.   Resilience: Failure of one service does not necessarily bring...
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SQL All Commands

 SQL All Commands Here is a list of common MySQL commands, categorized by their usage. This covers creating, managing, and interacting with databases and tables. 1. Database Commands Create a new database : sql Copy code CREATE DATABASE database_name; Select a database to use : sql Copy code USE database_name; Show all databases : sql Copy code SHOW DATABASES; Delete a database : sql Copy code DROP DATABASE database_name; 2. Table Commands Create a new table : sql Copy code CREATE TABLE table_name ( column1 datatype, column2 datatype, ... ); Show all tables in the selected database : sql Copy code SHOW TABLES; Show table structure (schema) : sql Copy code DESCRIBE table_name; Rename a table : sql Copy code RENAME TABLE old_table_name TO new_table_name; Drop a table : sql Copy code DROP TABLE table_name; Add a column to a table : sql Copy code ALTER TABLE table_name ADD column_name datatype; Modify a column in a table : sql Copy code ALTER TABLE table_name MODI...
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